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6947 Andrewdavis (1981 ET8)
Classification: Main-belt Asteroid          SPK-ID: 2006947
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06242026481921955 5.6346e-08  
a 2.398881278814948 1.3211e-08 au
q 2.249142474121451 1.3379e-07 au
i 3.878832229684614 6.0411e-06 deg
node 213.1933283771726 7.795e-05 deg
peri 352.3694144062468 8.9e-05 deg
M 161.7272566021816 4.423e-05 deg
tp 2456990.833575182750
(2014-Nov-29.33357518)
0.00016638 JED
period 1357.099091058528
3.72
1.1211e-05
3.069e-08
d
yr
n .2652717125609468 2.1913e-09 deg/d
Q 2.548620083508446 1.4036e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1001  
   data-arc span      21978 days (60.17 yr)  
   first obs. used      1955-04-20  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55173  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:21:41  

Additional Information
 Earth MOID = 1.24412 au 
 Jupiter MOID = 2.41339 au 
 T_jup = 3.521 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO250277  

6947 Andrewdavis           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Andrew M. Davis (b. 1950) is a meteoriticist at the University of Chicago. His work on the trace elemental and isotopic composition of meteorites has addressed fundamental questions about timescales and processes in the solar nebula.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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